{
  "slug": "weekly-volume-comparison",
  "title": "Weekly Volume Comparison Calculator",
  "category": "Progress Tracking",
  "category_slug": "progress-tracking",
  "tier": 2,
  "summary": "Track percentage change in total training volume between two weeks.",
  "description": "This calculator computes the percentage change in total training volume between two consecutive weeks using the standard percentage-change formula: ((Week 2 Volume − Week 1 Volume) / Week 1 Volume) × 100. It accepts Week 1 and Week 2 total volume in kilograms as inputs and returns the percent increase or decrease in weekly volume. This metric is commonly used in periodization tracking to quantify progressive overload or deload phases across training cycles.",
  "page_url": "https://fitmetriclab.com/en/tools/progress-tracking/weekly-volume-comparison/",
  "api_url": "https://fitmetriclab.com/api/tools/weekly-volume-comparison.json",
  "formula": {
    "id": "weekly_volume_comparison",
    "expression": "\\Delta\\% = \\frac{V_2 - V_1}{V_1} \\times 100",
    "variables": [
      {
        "symbol": "V_1",
        "description": "Week 1 volume in kg"
      },
      {
        "symbol": "V_2",
        "description": "Week 2 volume in kg"
      }
    ]
  },
  "inputs": [
    {
      "id": "week1_volume",
      "label": "Week 1 Volume",
      "type": "number",
      "unit": "kg",
      "default": 10000,
      "min": 1,
      "max": 200000,
      "step": 100
    },
    {
      "id": "week2_volume",
      "label": "Week 2 Volume",
      "type": "number",
      "unit": "kg",
      "default": 11000,
      "min": 0,
      "max": 200000,
      "step": 100
    }
  ],
  "worked_example": {
    "inputs": {
      "week1_volume": 10000,
      "week2_volume": 11000
    },
    "expected_output": "10.0%"
  },
  "result_summary_template": "Comparing a baseline volume of {week1_volume} kg in Week 1 to {week2_volume} kg in Week 2, the percentage change in weekly training volume is {result}.",
  "methodology": "Applies the standard percentage-change formula: ((Week 2 Volume - Week 1 Volume) / Week 1 Volume) × 100. Week 1 volume serves as the baseline denominator. This is a basic arithmetic comparison method, widely used in periodization tracking and training analytics.",
  "sources": [
    {
      "label": "Schoenfeld BJ, et al. Dose-response relationship between weekly resistance training volume and increases in muscle mass: A systematic review and meta-analysis. J Sports Sci. 2017;35(11):1073-1082.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/27433992/"
    },
    {
      "label": "Haff GG, Triplett NT. Essentials of Strength Training and Conditioning (4th ed). National Strength and Conditioning Association. Human Kinetics. 2016.",
      "url": "https://www.nsca.com/education/books/essentials-of-strength-training-and-conditioning-4th-edition/"
    },
    {
      "label": "Rønnestad BR, et al. Block periodization of high-intensity aerobic intervals provides superior training effects in trained cyclists. Scand J Med Sci Sports. 2014;24(1):34-42.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/22646668/"
    }
  ],
  "faqs": [
    {
      "question": "What counts as weekly volume for this calculator?",
      "answer": "Weekly volume is the sum of all sets × reps × weight (in kg) across every exercise performed in a seven-day training block. This includes all working sets but typically excludes warm-up sets, though counting methods vary by program."
    },
    {
      "question": "What does a negative percentage mean?",
      "answer": "A negative percentage indicates that Week 2 volume was lower than Week 1 volume. This occurs during deload weeks, taper phases, or when reducing volume due to fatigue or schedule constraints."
    },
    {
      "question": "Can this tool compare non-consecutive weeks?",
      "answer": "The calculator compares any two weekly volume totals entered. They do not need to be consecutive; Week 1 and Week 2 are labels for baseline and comparison periods, not calendar constraints."
    },
    {
      "question": "Does the calculator account for exercise difficulty or intensity?",
      "answer": "No. The tool performs a simple percentage comparison of total kilograms moved. It does not weight exercises by difficulty, rep ranges, or proximity to failure. Two workouts with identical volume may differ significantly in training stimulus."
    },
    {
      "question": "How is this different from tracking individual lifts?",
      "answer": "This calculator aggregates all training into a single volume metric. Individual lift tracking shows performance on specific exercises, while weekly volume comparison summarizes total training load across all movements for a given period."
    }
  ],
  "related_tools": [
    {
      "slug": "pr-progression",
      "title": "Personal Record Progression Calculator",
      "api_url": "https://fitmetriclab.com/api/tools/pr-progression.json",
      "page_url": "https://fitmetriclab.com/en/tools/progress-tracking/pr-progression/"
    },
    {
      "slug": "strength-progression",
      "title": "Strength Progression Calculator",
      "api_url": "https://fitmetriclab.com/api/tools/strength-progression.json",
      "page_url": "https://fitmetriclab.com/en/tools/progress-tracking/strength-progression/"
    },
    {
      "slug": "time-to-goal-weight",
      "title": "Time-to-Goal Calculator (Weight)",
      "api_url": "https://fitmetriclab.com/api/tools/time-to-goal-weight.json",
      "page_url": "https://fitmetriclab.com/en/tools/progress-tracking/time-to-goal-weight/"
    }
  ],
  "last_updated": "2026-04-22",
  "price": {
    "value": 0,
    "currency": "USD"
  },
  "runs_in_browser": true,
  "disclaimer": "Educational estimate produced from a published formula. Not medical, nutritional, or training advice. Calculations are deterministic — apply the formula to the inputs to reproduce the result."
}